Maria Irigoyen defeated Karolina Kosinska 6-3 6-3 in the Lutz FL 25K round of 32 on clay. The upset overturned the form book — Karolina Kosinska came in leading the head-to-head 1–0, but Maria Irigoyen had been the form player, winning 1 of their last 4 on clay. Maria Irigoyen claimed a first win over Karolina Kosinska in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-10-27 | Mexico City 10K | QF | hard | Karolina Kosinska | 7-6(6) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.